USB wall charger



FIG. 1 is a perspective view showing a USB wall charger, showing my new design;

FIG. 2 is yet another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a side view thereof; and,

FIG. 8 is an opposite side view thereof. 

CLAIM The ornamental design for a USB wall charger, as shown and described. 